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<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>后盾人</title>
</head>

<body>
  <!-- 后盾人 -->
  <div id="hd"></div>
  <h2>houdunren.com</h2>
  <script>
    

    let hd = document.getElementById("hd")
    
    function a(el) {
      let tag = Object.getPrototypeOf(el);
      console.log(tag);
      Object.getPrototypeOf(tag) ? a(tag) : ''
    }
    a(hd);
  </script>
</body>

</html>